7690681987domain: NAppears in sequencesNumber of lower triangles of an n X n integer array with all row and column sums zero and all row and column sums of squares <=8.at n=7A195886T(n,k) = Number of lower triangles of an n X n integer array with all row and column sums zero and all row and column sums of squares <= 2k^2.at n=43A195892